Bowl liner for rock crusher



Get. 13, 1970 F. w. CARTER, JR

BOWL LINER FOR ROCK CRUSHER Filed Nov. 22, 1968 5 Sheets-Sheet l INVENTOR. I

FLOYD w. CARTERJR kl. YS j ATTORN 0a. 13, 1970 w, CARTER, JR 3,533,569

BOWL LINER FOR ROCK CRUSHER Filed Nov. 22, 1968 s Sheets-Sheet z INVENTOR, FLOYD W. CARTERJR ATTORNEYS F. -W. CARTER, JR

BOWL LINER FOR ROCK CRUSHER Oct. 13, 1970 5 Sheets-Sheet 5 Filed Nov. 22, 1968 FEG 3 FIG. 4

'INVENTOR.

FLOYD w. CARTER,JR BY ATTOR NEYS United States Patent 3,533,569 BOWL LINER FOR ROCK CRUSHER Floyd Walter Carter, Jr., Beaverton, Oreg., assignor to Columbia Steel Casting Co. Inc., Portland, Oreg., a corporation of Oregon Filed Nov. 22, 1968, Ser. No. 778,250 Int. Cl. B02c 2/04 US. Cl. 241-207 6 Claims ABSTRACT OF THE DISCLOSURE A frusto-conical bowl liner for connection with a bowl or bonnet of a gyratory rock crusher comprises a plurality of spaced apart ears or lug members extending outwardly from the outer conical surface of the liner. The lug members having transverse openings are adapted to extend upwardly through similarly spaced apart bowl openings and through bowl boss portions that provide a flat surface surrounding each of the bowl openings. A filler block fits loosely through a transverse opening in each liner lug with its opposite ends supported on a flat washer plate which in turn is supported on the flat boss surface. Set screws near the ends of the filler plug serve to adjust the position of the liner relative to the bowl or bonnet.

This invention relates to improvements in gyratory type crushers, and more particularly it relates to an improved means for attaching a bowl liner to a crusher in an underlying position relative to the crusher bowl or bonnet so that the two frusto-conical surfaces are engaged in a manner that will insure complete circumferential seat bearing and that the bowl liner will be properly spaced above the mantle on the gyratory head of the crusher when the crusher is assembled.

In gyratory crushers, bowl liners of manganese steel are commonly attached to the bowl and used until they have become worn and need to be replaced. It is essential that such liners be attached so that the removal of the old liner and the installation of the new one can be accomplished with the minimum of time and labor. Moreover, when installed the liner must be firmly held in precisely the desired position to provide complete circumferential seat bearing and the proper clearance with the mantle on the rotary crusher head, and also to provide a uniform space between the liner and the bowl into which an interconnecting layer of filler material can be poured. In prior rock crusher designs, lugs or cars on the bowl liner were utilized which extended upwardly through openings in the bowl for the purpose of holding the liner on the bowl. For example, in the US. patent to Gruender (2,226,341) such lugs are used in combination with U- bolts for attaching the liner to the bowl. However, in this device the lugs are located inside the bowl and are relatively inaccessible thereby requiring a laborious disassembly of the crusher to facilitate a liner installation or in re-tightening a liner which has become loose. In a more recent patent to Johnson (3,281,083) a series of I-bolt like ears are used in combination with wedge members. With such wedges the ears often became bent during installation of the liner, and in general it was difficult to secure the liner to the bowl and position it with complete circumferential bearing with precision. Also when any misalignment of the liner occurred during the crusher operation it was impossible to adjust the liners position on the bowl because of the wedges.

A general object of the present invention is to provide a crusher liner having means for attaching it to a crusher bowl that will overcome the aforesaid problems.

Another object of my invention is to provide a bowl liner that can be easily attached to and removed from a 3,533,569 Patented Oct. 13, 1970 ice crusher bowl in a relatively small amount of time and without the need for special skills or tools.

Yet another object of the present invention is to provide a liner for a gyratory crusher that can be easily adjusted in alignment on the bowl so that the space for receiving an interconnecting layer of filler material can be controlled with precision.

In brief, the present invention comprises a bowl liner having a series of ears or lugs on its upper surface which extend through openings in the bowl with each ear having a transverse opening and co-operating with a filler block extending therethrough. Each filler block is originally inserted within an ear opening with considerable clearance and then caused to secure the liner and pull it towards the bowl by means of a pair of adjustable set screws. With my invention, the bowl liner can be attached firmly to the bowl in a desired position for proper alignment with the precise force required, the position and force being adjustable by the set screws on each filler block. Thus, the installation or removal of the liner can be accomplished rapidly without the need for skilled labor and a change of liner will cause only a small loss in production time.

Other objects, advantages and features of the present invention will become apparent from the following detailed description presented in conjunction with the accompanying drawings in which:

FIG. 1 is a view in section showing a typical gyratory rock crusher utilizing a bowl liner embodying the principles of the present invention;

FIG. 2 is a fragmentary plan view of the crusher of FIG. 1 takenalong the line 2-2;

FIG. 3 is an enlarged fragmentary "view in section showing the bowl liner of FIG. 1;

FIG. 4 is a further enlarged view in section taken along the line 44 of FIG. 3.

Referring to the drawing, FIG. 1 shows a typical gyratory crusher 10 utilizing a bowl liner 12 embodying the principles of the present invention. Essentially, the crusher comprises a gyratory head 14 to which is fixed a mantle 16 of manganese steel that provides a protective replaceable cover for the head. Surrounding the gyratory head is a cylindrical frame or bowl support 18 to the upper end of which is attached an annular bowl or bonnet 20 having central opening 22 that increases in diameter from its upper end. The bowl has a radially extending flange 24 at its upper end to which is fixed a feed hopper 26 that supplies the material to be crushed to the opening 22.

Inside the bowl 20 is the liner 12 which has generally a frusto-conical shape and is also preferably made of manganese steel or some other wear resistant material. On the outer surface of the bowl liner and spaced downwardly from its upper end are a series of upwardly extending ears or lugs 28. These lugs are spaced apart circumferentially to match similarly spaced apart openings 30 in the bowl (see FIG. 2). Although the liner shown has provision for four lugs, a different number and spacing could be used. The bowl openings extend upwardly through boss members 32 that project from on the outside surface of the bowl, each boss member having a flat upper surface 34.

In accordance with the conventional practice in installing bowl liners and mantles, an interconnecting layer of filler 36 is interposed between the outer surface of the bowl liner 12 and the opposed inner surface of the bowl 20. The desired thickness of this filler layer is formed when the outer liner surface and the inner bowl surface are brought into contact with each other at their lower ends. However, the bringing together of the liner and the bowl in this manner and in the proper alignment, is accomplished by means of the lugs 28. With the lower liner and bowl surfaces 3-8 and 40 respectively, in engagement, as shown in FIGS. 3 and 4, the lugs 28 extend above the boss surfaces 34 and a transverse opening 42 in each lug also extends above the boss surface 34. In the drawings, the lugs 28 are shown typically as comprising closed loop members with the opening 42 forming an upper bearing surface 44. However, it is apparent that the lugs do not have to be closed, but could be C-shaped or hook-shaped as long as the bearing surface 44 and adequate strength are provided. Through. each of the lug openings 42 a filler block 43 is provided which serves to hold the liner to the bowl. Beneath the filler block an elongated guide plate 45 is preferably provided. The latter has a pair of transverse rib members 46 projecting downwardly from the bottom side of the plate. These rib members are spaced apart an amount slightly greater than the thickness of the lug and thus they serve to center each lug within its bowl opening 30. Near the ends of each filler block are a pair of set screws 48 each with a lock nut 50 for holding them in a present position within the filler block. The set screws extend downwardly through holes tapped in the filler block and their lower ends bear against the guide plate or washer 48 which rests on the bowl boss surface 34. Thus, when the set screws are turned, their lower ends engage the plate 45 and move the filler block 43 upwardly with respect to the boss surface 34 supporting the guide washer and the filler block. This will lift the bowl liner with respect to the bowl and thereby enable these two components to be drawn together and aligned with just the right amount of uniform space between their upper end portions for receiving the filler that provides the interconnecting layer 36.

When a bowl liner is to be installed on a crusher bowl using my invention, the procedure is as follows. The manganese bowl liner 12 is first placed within the bowl and held in position with its lugs extending upwardly through the openings and beyond the top surface of each boss member. A guide plate 45 is placed through the opening in each lug 28 with its rib members 46 extending into the boss opening on opposite sides of the lug. This serves to center the bowl liner within the bowl to some degree. Now, each filler block with only one set screw 48 and lock nut in place, is inserted within a lug opening over its guide Washer and is centered thereon. The filler blocks 43 are easily placed in position since the clearance within the lug opening 30 is ample. A shim may be placed on the top of each filler block if desired, and if shims are used the same number and thickness should be used for each filler block. The second set screw and its lock nut for each filler block is now inserted. Working back and forth from opposite sides of the bowl the set screws 48 are gradually tightened so that the bowl liner is drawn axially up against the bowl. In this manner, perfect alignment between the liner and the bowl is maintained so that the space at the upper end for the filler is uniform in thickness and the lower surfaces 38 and of the two members come together to form a fluid seal. The filler may now be poured to form the interconnecting layer 36 between the bowl and the liner.

During the installation of the liner no impact force on the parts is necessary and its position within the bowl can be carefully and precisely adjusted by the torquing of the set screws. If the liner should require an alignment adjustment due to some exceptionally hard usage or when it requires replacement when worn out, these functions may be easily accomplished with a minimum of time loss and labor by the appropriate manipulation of the set screws.

To those skilled in the art to which this invention relates, many changes in construction and widely differ ing embodiments and applications of the invention will suggest themselves without departing from the spirit and scope of the invention. The disclosures and the description herein are purely illustrative and are not intended to be in any sense limiting.

I claim:

1. A bowl liner for a rock crusher of the type having a head for gyration beneath the liner and cooperable therewith for crushing rock and a bonnet thereabove against which the bowl liner is to be clamped, said bowl liner comprising:

a generally circular rigid member having a lower crushing face that generally is of frusto-conical form;

said bowl liner having an upper mounting face for engagement with the bonnet of said crusher and a plurality of uniformly spaced apart upstanding ears for projecting through said bonnet, each ear having a transverse opening forming an upper bearing surface; a

a filler block fitted loosely within and extending through said transverse opening of each said ear, said block having tapped bores at opposite ends;

set screws in said bores of each said filler block for moving it upwardly against said bearing surface, thereby imparting an adjustable reactive force on each of said ears for positioning the liner on and securing it to said bonnet.

2. The bowl liner as described in claim 1 including a washer plate in combination with each said filler block within each said ear, said plate having a flat surface on one side adapted to be adjacent said filler block and parallel rib portions on its other side spaced apart by a distance greater than the thickness of said ear.

3. A rock crusher of the type having a gyrotory head comprising:

a circular bonnet located above said head, said bonnet having a plurality of circumferentially spaced apart boss portions with an opening formed in each said boss portion;

a bowl liner within said bonnet and disposed in general overlying spaced relation with respect to said head, said liner having a plurality of integral upstanding ears projecting upwardly through said bonnet openings, said ears having in the upper portions thereof holes extending transversely therethrough;

a filler block fitted loosely within and extending through said transverse opening of each said ear;

and means in said filler blocks and cooperating with said boss portion of said bonnet for imparting an adjustable reactive force on each of said ears thereby positioning the liner on and securing it to said bonnet.

4. The rock crusher as described in claim 3 wherein each said filler block has an elongated oblong shape with upper and lower planar surfaces on opposite sides of its longitudinal axis which extends through an ear opening.

5. The rock crusher as described in claim 4 wherein said means comprises a pair of set screws in each said filler block movable axially along spaced apart lines perpendicular to the longitudinal axis.

6. The rock crusher as described in claim 5 including a Washer plate for each filler block located between its bottom surface and a boss portion of said bonnet, each said washer plate having rib portions extending downwardly for centering each said ear within its bonnet opening.

References Cited UNITED STATES PATENTS 2,226,341 12/1940 Gruender 24l299 2,718,358 9/1955 Burls 241-299 X 3,063,649 1 1/ 1962 Pollak 241-2-99 3,281,083 10/1966 Johnson 241-299 X DONALD G. KELLY, Primary Examiner US. Cl. X.R. 241 299 

